../ dmsp_15_ephemeris_20110527.txt 22-Jun-2023 00:17 109535 dmsp_16_ephemeris_20110527.txt 22-Jun-2023 00:17 109637 dmsp_17_ephemeris_20110527.txt 22-Jun-2023 00:17 109678 dmsp_18_ephemeris_20110527.txt 22-Jun-2023 00:17 109647